Remodelling of the superficial vascular network of skin flaps in rats, following a vasodilatory cream application, before elevation.

Flap necrosis on random pattern skin flaps continues to be a challenge. In this study, we evaluated whether topical application of a vasodilator substance (the prostaglandin PGI2 analogue, Iloprost®, in cream form) as pre-treatment, would increase blood flow and improve flap viability. Wistar rats randomly allocated into four groups with 7 rats per group and two flaps 4cm × 2cm in the same rat i.e. 56 flaps were developed. Flaps on the wright side received pre-treatment with Cream in different drug concentrations, 2.5µgr/gr, 5 µgr/gr, and 10µgr/gr and 20 µgr/gr containing the active factor Iloprost®® ZK 36,374(M. W 360.5) prepared with white petrolatum as a base. Flaps on the left side received placebo cream (white petrolatum). After 10 days of flap pre-treatment, evaluation of blood flow by laser Doppler flowmetry (LDF) were recorded, then flap elevation and re suturing back were performed. After 7 days we estimated flap viability on digital imaging and the percentages of flap survival estimated. Means and standard deviations were used to describe blood flow measurements and survival percentages. The significance was set at 0.05 in all cases and the analysis were carried out with the use of the SPSS v23.0. Furthermore, we performed dynamic analyses of circulation using the radioisotope 99mTc which confirmed hyperaemia of the treated areas relative to that observed in control areas. These findings demonstrated that pretreatment of skin flaps with Iloprost® cream for 10 days prior to elevation increased blood flow in the flap and improved their overall survival rate.

The Supraclavicular Artery Island Flap for Pharynx Reconstruction.

The supraclavicular artery island flap (SCAIF) is a reliable, easy-to-harvest and versatile fasciocutaneous flap that can be used for pharynx reconstruction. Instead of free flaps, it requires no microsurgical technique, reduced operating time and postoperative care, making it an ideal option, especially during the COVID-19 pandemic. The primary aim of our study was to present two cases of a total laryngectomy and reconstruction with the SCAIF during the pandemic. The secondary aim was to review the literature concerning surgical techniques, complications and contradictions of the SCAIF for pharynx reconstruction. A literature search was performed using the PubMed, ScienceDirect, Wiley Online Library, Google Scholar, Scopus and Cochrane Library databases, using MeSH terms: larynx AND reconstruction AND flap. Ten full-text articles comprising 92 patients with 93 supraclavicular flaps were included. The patch graft, pharyngeal interposition graft, tubularization or "U"-shaped SCAIF were the main surgical techniques. Pharyngocutaneous fistula was the most frequent postoperative complication, especially in patients with previous radiotherapy, but just 19% of patients required secondary intervention. The lack of donor-site morbidity, low flap loss rates and stenosis rates favored this reconstructive option. This review underlined that the SCAIF has comparable results with other reconstructive options, consolidating this flap in the workhorse of pharynx reconstruction.

The Value of Three-Dimensional Modeling on Repositioning and Soft Tissue Filling in Microsurgical Reconstruction of Secondary Mandibular Defects: A Retrospective Study.

Purpose Secondary mandibular defect reconstruction is a challenging operation. It is performed rather rarely, as in most of the cases a primary reconstruction is preferable. Restoration of function and symmetry, in secondary reconstruction of mandibular defects, requires accurate repositioning of segments and appropriate soft tissue filling. The purpose of this study is to estimate the value of three-dimensional (3D) digital modeling to meet the above requirements, in secondary microsurgical reconstruction of mandibular defects. Methods Five cases of mandibular defects, with various degrees of asymmetry and dysfunction, were restored secondarily, with fibula flaps, after virtual reconstruction on a 3D model derived from their computed tomography, with the utilization of CAD-CAM software. Software reproduced symmetrical 3D models by mirroring the healthy side. Occlusion was restored by fine adjustments on 3D models and finally a reconstruction plate was pre-bent on them, prior to its sterilization for use in surgery. Three out of the five cases received an osteo-cutaneous flap, while in the other two patients, an osseous flap was used. Lower face symmetry, mouth opening, and main patient's complaints were evaluated pre- and postoperatively to assess the value of the 3D modeling. Results All flaps survived. Hematoma occurred in two patients and was resolved after evacuation. In two patients, a fistula observed, was attributed to screw loosening, and treated after a surgical debridement and screw replacement. Intraoral exposure in the posterior part of the fibula flap was recorded in one patient, possibly from wound dehiscence due to tension of the intraoral tissue, and successfully covered with an ipsilateral nasolabial flap. The resulting symmetry and function were satisfactory in all the patients. Conclusion Secondary mandibular defects are often related with cosmetic disfigurement, misalignment of mandibular segments, and mandibular malfunction. For the correction of mandibular continuity, symmetry, and restoration of function, preoperative 3D modeling may be an important tool, according to our results.